Make remaining simple functions constexpr

[chfast]

No description provided.

[sonarqubecloud]

Quality Gate passed

Issues
16 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.94%. Comparing base (9196508) to head (fc35267).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #305   +/-   ##
=======================================
  Coverage   99.94%   99.94%           
=======================================
  Files          10       10           
  Lines        1882     1890    +8     
=======================================
+ Hits         1881     1889    +8     
  Misses          1        1           

Flag	Coverage Δ
32bit	99.94% <100.00%> (+<0.01%)	⬆️
gcc	99.41% <100.00%> (+<0.01%)	⬆️

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Files	Coverage Δ
include/intx/intx.hpp	99.86% <100.00%> (ø)
test/unittests/test_div.cpp	100.00% <ø> (ø)
test/unittests/test_int128.cpp	100.00% <ø> (ø)
test/unittests/test_intx_api.cpp	100.00% <100.00%> (ø)